6639061 has 16 divisors (see below), whose sum is σ = 8261568. Its totient is φ = 5241600.

The previous prime is 6639049. The next prime is 6639067. The reversal of 6639061 is 1609366.

It is not a de Polignac number, because 6639061 - 2⁹ = 6638549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1066 + ... + 3796.

It is an arithmetic number, because the mean of its divisors is an integer number (516348).

Almost surely, 2^6639061 is an apocalyptic number.

It is an amenable number.

6639061 is a deficient number, since it is larger than the sum of its proper divisors (1622507).

6639061 is a wasteful number, since it uses less digits than its factorization.

6639061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2772.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 6639061 is about 2576.6375375671. The cubic root of 6639061 is about 187.9470671107.

The spelling of 6639061 in words is "six million, six hundred thirty-nine thousand, sixty-one".